>>Basically it is saying that it is trying to close tables that are already closed.
>>
>>Now I understand this is bad programming, but why is it an error ?
>>Why can't vfp just ignore this condition ? (maybe it is trying to teach us programming!).
>
>I always use the following syntax to close a table:
>

>use in iif(used("myAlisa"),"myAlias",0)
>

You can use this, it's shorter:

USE IN SELECT("myAlias")